HVAC EXCELLENCE ELECTRICITY Exam
(New 2026/ 2027 Update) Questions &
Answers {Grade A} 100% Correct (Verified
Solutions)
A parallel circuit consists of three resistors.R1 = 30 Ohms, R2 = 15 Ohms, R3 = 10 Ohms.
If the current through R2 is 4 Amps (I = 4 Amps), what is the source Voltage? - Correct
answer 60 volts
Three 300 ohm resistors are wired in parallel. The total resistance equals; - Correct
answer 100 ohms
An electronically commutated motor (ECM) is designed to; - Correct answer provide
proper air flow under various conditions.
Resistance can be calculated by: - Correct answer E divided by I.
Divided Voltage can be calculated by; - Correct answer I times R
,An ohmmeter should never be connected to; - Correct answer a live circuit or a
charged capacitor until it has been discharged
Which of the following would be considered an inductive load? - Correct answer
electric motor
The voltage to ground of a "high Leg" or "Stinger Leg" on a three phase open Delta
system will be approximately; - Correct answer 208
A transformer has 1000 turns of wire in the primary coil and 500 turns in the
secondary coil. If 120 volts are applied, the output voltage will be. - Correct answer 60
volts
A transformer has 1000 turns of wire in the primary coil and 2000 turns in the
secondary coil. If 120 volts are applied, the output voltage will be; - Correct answer 240
volts
, Which of the following is the symbol for Impedance in an AC circuit? - Correct answer
Z
When current flows in a two wire circuit (such as 120 volts) if a clamp on amp meter is
clamped around both wires. What measurement would you expect? - Correct answer
Zero amps due to cancelation of the two fields.
If the conductor in an AÇ circuit is wound into a coil, the resulting EMF opposes the
supply voltage. This opposition is called. - Correct answer inductive reactance.
A diode is used to; - Correct answer control the direction of electron flow.
A ___________ is commonly used on a single phase capacitor start fractional horse
power compressor motor to disconnect the start winding after the motor starts. -
Correct answer current relay
Direction of rotation of a single phase induction motor is determined by. - Correct
answer the direction of current flow through the start winding.
(New 2026/ 2027 Update) Questions &
Answers {Grade A} 100% Correct (Verified
Solutions)
A parallel circuit consists of three resistors.R1 = 30 Ohms, R2 = 15 Ohms, R3 = 10 Ohms.
If the current through R2 is 4 Amps (I = 4 Amps), what is the source Voltage? - Correct
answer 60 volts
Three 300 ohm resistors are wired in parallel. The total resistance equals; - Correct
answer 100 ohms
An electronically commutated motor (ECM) is designed to; - Correct answer provide
proper air flow under various conditions.
Resistance can be calculated by: - Correct answer E divided by I.
Divided Voltage can be calculated by; - Correct answer I times R
,An ohmmeter should never be connected to; - Correct answer a live circuit or a
charged capacitor until it has been discharged
Which of the following would be considered an inductive load? - Correct answer
electric motor
The voltage to ground of a "high Leg" or "Stinger Leg" on a three phase open Delta
system will be approximately; - Correct answer 208
A transformer has 1000 turns of wire in the primary coil and 500 turns in the
secondary coil. If 120 volts are applied, the output voltage will be. - Correct answer 60
volts
A transformer has 1000 turns of wire in the primary coil and 2000 turns in the
secondary coil. If 120 volts are applied, the output voltage will be; - Correct answer 240
volts
, Which of the following is the symbol for Impedance in an AC circuit? - Correct answer
Z
When current flows in a two wire circuit (such as 120 volts) if a clamp on amp meter is
clamped around both wires. What measurement would you expect? - Correct answer
Zero amps due to cancelation of the two fields.
If the conductor in an AÇ circuit is wound into a coil, the resulting EMF opposes the
supply voltage. This opposition is called. - Correct answer inductive reactance.
A diode is used to; - Correct answer control the direction of electron flow.
A ___________ is commonly used on a single phase capacitor start fractional horse
power compressor motor to disconnect the start winding after the motor starts. -
Correct answer current relay
Direction of rotation of a single phase induction motor is determined by. - Correct
answer the direction of current flow through the start winding.
